X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=bluechips%2Fmodel%2F__init__.py;h=e251d5099db3bcde35868462202ffc34fcac7096;hb=69631608356221409b30b8bcc93441adf810c767;hp=d64463bfefb45f8fa1f8a600f9dfcfd08b2d4b7e;hpb=f8814994349f84b9636c22e75c75e02511a8eb36;p=bluechips.git

diff --git a/bluechips/model/__init__.py b/bluechips/model/__init__.py
index d64463b..e251d50 100644
--- a/bluechips/model/__init__.py
+++ b/bluechips/model/__init__.py
@@ -3,36 +3,125 @@ import sqlalchemy as sa
 from sqlalchemy import orm
 
 from bluechips.model import meta
+from bluechips.model import types
+
+import datetime
 
 def init_model(engine):
     """Call me before using any of the tables or classes in the model"""
-    ## Reflected tables must be defined and mapped here
-    #global reflected_table
-    #reflected_table = sa.Table("Reflected", meta.metadata, autoload=True,
-    #                           autoload_with=engine)
-    #orm.mapper(Reflected, reflected_table)
 
     sm = orm.sessionmaker(autoflush=True, transactional=True, bind=engine)
 
     meta.engine = engine
     meta.Session = orm.scoped_session(sm)
 
+### Database Schemas ###
+
+users = sa.Table('users', meta.metadata,
+                 sa.Column('id', sa.types.Integer, primary_key=True),
+                 sa.Column('username', sa.types.Unicode(32), nullable=False),
+                 sa.Column('name', sa.types.Unicode(64)),
+                 sa.Column('resident', sa.types.Boolean, default=True)
+                 )
+
+expenditures = sa.Table('expenditures', meta.metadata,
+                        sa.Column('id', sa.types.Integer, primary_key=True),
+                        sa.Column('spender_id', sa.types.Integer,
+                                  sa.ForeignKey('users.id'), nullable=False),
+                        sa.Column('amount', types.Currency, nullable=False),
+                        sa.Column('description', sa.types.Text),
+                        sa.Column('date', sa.types.Date, default=datetime.now),
+                        sa.Column('entered_time', sa.types.DateTime, 
+                                  default=datetime.now)
+                        )
+
+splits = sa.Table('splits', meta.metadata,
+                  sa.Column('id', sa.types.Integer, primary_key=True),
+                  sa.Column('expenditure_id', sa.types.Integer,
+                            sa.ForeignKey('expenditures.id'), nullable=False),
+                  sa.Column('user_id', sa.types.Integer,
+                            sa.ForeignKey('users.id'), nullable=False),
+                  sa.Column('share', types.Currency, nullable=False)
+                  )
+
+subitems = sa.Table('subitems', meta.metadata,
+                    sa.Column('id', sa.types.Integer, primary_key=True),
+                    sa.Column('expenditure_id', sa.types.Integer,
+                              sa.ForeignKey('expenditures.id'), nullable=False),
+                    sa.Column('user_id', sa.types.Integer,
+                              sa.ForeignKey('users.id'), nullable=False),
+                    sa.Column('amount', types.Currency, nullable=False)
+                    )
+
+transfers = sa.Table('transfers', meta.metadata,
+                     sa.Column('id', sa.types.Integer, primary_key=True),
+                     sa.Column('debtor_id', sa.types.Integer,
+                               sa.ForeignKey('users.id'), nullable=False),
+                     sa.Column('creditor_id', sa.types.Integer,
+                               sa.ForeignKey('users.id'), nullable=False),
+                     sa.Column('amount', types.Currency, nullable=False),
+                     sa.Column('description', sa.Text, default=None),
+                     sa.Column('date', sa.types.Date, default=datetime.now),
+                     sa.Column('entered_time', sa.types.DateTime,
+                               default=datetime.now)
+                     )
+
+### ORM Classes ###
+
+class User(object):
+    def __repr__(self):
+        return '<User: %s>' % (self.username)
+
+class Expenditure(object):
+    def __repr__(self):
+        return '<Expenditure: spender: %s spent: %s>' % (self.spender,
+                                                         self.amount)
+
+class Split(object):
+    def __repr__(self):
+        return '<Split: expense: %s user: %s share: %s>' % (self.expenditure,
+                                                            self.user,
+                                                            self.share)
+
+class Subitem(object):
+    def __repr__(self):
+        return '<Subitem: expense: %s user: %s cost: %s>' % (self.expense,
+                                                             self.user,
+                                                             self.amount)
+
+class Transfer(object):
+    def __repr__(self):
+        return '<Transfer: from %s to %s for %s>' % (self.debtor,
+                                                     self.creditor,
+                                                     self.amount)
+
+### DB/Class Mapping ###
+
+orm.mapper(User, users)
+
+orm.mapper(Expenditure, expenditures, properties={
+        'spender': orm.relation(User, backref='expenditures')
+})
+
+orm.mapper(Split, splits, properties={
+        'expenditure': orm.relation(Expenditure, backref='splits'),
+        'user': orm.relation(User)
+})
+
+orm.mapper(Subitem, subitems, properties={
+        'expenditure': orm.relation(Expenditure, backref='subitems'),
+        'user': orm.relation(User)
+})
+
+orm.mapper(Transfer, transfers, properties={
+        'debtor': orm.relation(User,
+                               primaryjoin=(transfers.c.debtor_id==\
+                                                users.c.id)),
+        'creditor': orm.relation(User,
+                                 primaryjoin=(transfers.c.creditor_id==\
+                                                  users.c.id))
+})
 
-## Non-reflected tables may be defined and mapped at module level
-#foo_table = sa.Table("Foo", meta.metadata,
-#    sa.Column("id", sa.types.Integer, primary_key=True),
-#    sa.Column("bar", sa.types.String(255), nullable=False),
-#    )
-#
-#class Foo(object):
-#    pass
-#
-#orm.mapper(Foo, foo_table)
-
-
-## Classes for reflected tables may be defined here, but the table and
-## mapping itself must be done in the init_model function
-#reflected_table = None
-#
-#class Reflected(object):
-#    pass
+__all__ = ['users', 'expenditures', 'splits', 'subitems', 'transfers',
+           'User', 'Expenditure', 'Split', 'Subitem', 'Transfer',
+           'meta']